VS1003 debugging routine

development tool IAR

chip :MSP430F5438

Audio module :VS1003B/VS1053

First get it, then , It's like going online to find a driver made by others and using it directly ,( si )

Looking for a day without fruit , Only fragments can be found , Or the chip model is wrong , I also saw it in the middle n Many articles introduce VS1003 Debug routine , I also saw several drivers .

About . Not much code . It's not very complicated .

good

Since there is no online can , Then start transplanting others . A meal check VS manual , Look at the notes of others' projects , Development completed , The test was completely silent , What is Zhengxuan wave , what MP3 , Not a hair ....

I'll be good .

To analyze  

First VS1003 Several pins of , Is it connected incorrectly , Checked several times before and after , Even wonder if DREQ You need to pull up the resistor .

  In the middle STM A development board for , Use ST The project has verified ,STM It can work on the board , and DREQ Whether there is a pull-up resistor is irrelevant

Then began to doubt Baud rate problem , hold MPS430 Take out your manual USCI I checked it from beginning to end ,VS1003 Above description  

vs The default frequency doubling is 1.0x    vs The crystal oscillator connected to the board of is 12.88Mhz Of , Then it should be no more than 3M.  Okay

Start adjusting SPI Rate , To adjust to 3M, No sound .

No longer doubt the code problem , Began to doubt life

Look through the code again , That's all right. , Then compare it with stm32 The driver , Find out st Of SPI The rate is adjusted very low . Start to slow down the rate , The reality is that SPI In operation SCI Time cannot exceed 400K. Is the key , Because more than 400K, Data sent by the host , The slave cannot receive . This is the problem

A miracle happened , It can be played normally Zhengxuan wave . Happy . But I'm not happy 5 minute . It is found that Zhengxuan wave can be played , But play MP3 file , Here's a moment DERQ It will not be raised .

Is it too fast to finish playing .

Adjust whether it is Turn the frequency up and down , Always can only sin test , Instead of playing MP3 file . Then try to read the register data , I found that I couldn't read .

Then I found the oscilloscope , Yes CS  DSC  SCLK MISO SIMO Take measurements , Find out SOMI Indeed, the data is wrong , OK, forget it first , Since I can write it in , Then it should be normal , Read again VS Manuals . A detail was ignored before .:

 

SDI At work CS In fact, it is high   in other words Sending MP3 The data should be DSC Pull it down   CS pull up ,( Actually, it's a little against SPI cs Selected )

This makes me miserable , During this period, it is suspected that SMCLK and MCLK problem , Modify DCS and CS Control it ,

The test again ,MP3 It can play normally . Previously, it was still used 400K The following rate , I found that the sound was not smooth , Try to spi Speed up , If you need to use SCI take vs1003 Of 03 Register frequency doubling to 3 times . Here we are mp3 Playback process .

 

 

The whole use process :

 

  VS10XX_HardwareReset();// adopt RES foot restart vs1003

    Mp3DeselectControl(); // pull up CS foot
    Mp3DeselectData();// pull up DCS foot
    
    Mp3SelectData();       // Open data slice selection , That is to open SDI Pass on  xDCS = 1, choice VS10XX Data interface
    SPI_Write_Byte(0xFF);
    SPI_Write_Byte(0xFF);
    SPI_Write_Byte(0xFF);
    SPI_Write_Byte(0xFF);
    Mp3DeselectData();        // Close data slice selection

    VS_Write_Reg(0,0x08,0x04);  // Software reset , towards 0 No. register is written 0x0804   SM_SDINEW by 1   SM_RESET by 1
    VS_Write_Reg(3,0x98,0x00);  // The clock is set , towards 3 No. register is written 0x9800   SC_MULT   by 4   SC_ADD   by 3   SC_FREQ by 0
    VS_Write_Reg(SPI_VOL   ,0x30,0x30);  // Volume settings , towards 0B Number register write in   Left voice way 30 Right channel 30  ---0x00,0x00 Both left and right channels have maximum volume
   
    Mp3SelectData();         // Open data slice selection , Note that this time XCS（ Command chip selection ） High level ,SDI It works
    SPI_Write_Byte(0);    // Write data , Write here 4 individual 0, It's irrelevant data , Used to start data transmission
    SPI_Write_Byte(0);
    SPI_Write_Byte(0);
    SPI_Write_Byte(0);
    Mp3DeselectData();        // Close data slice selection ,SDI Invalid
    
    set_SPI_bps(5);// Set up High frequency rate

 

Then you can test Zhengxuan wave and mp3 It's on

/***********************************************************************
**********
28
** The name of the function : void VS_SinTest(INT8U x).
** Function description : Sine test function , Check vs1003 If there is something wrong .
** Input parameters : INT8U x Sine wave frequency .
** Output parameters : None.
** Returns the parameter : None.
***********************************************************************
***********/

void VS_SinTest(int x)
{
    VS_Write_Reg(0x00,0x08,0x20);/* Start the test , towards 0 No. register is written 0x0820 SM_SDINEW by 1  SM_TEST by 1 */

   while(!(P2IN&MP3_DREQ));  //VS1003 Of DREQ High to write data
    Mp3SelectData();       // Open data slice selection , That is to open SDI transmission
    SPI_Write_Byte(0x53);  /* Write the following 8 Bytes , Enter sine test */
    SPI_Write_Byte(0xef);
    SPI_Write_Byte(0x6e);
    SPI_Write_Byte(x);  /* Parameters x Used to adjust the frequency of sine wave in sine test */
    SPI_Write_Byte(0);
    SPI_Write_Byte(0);
    SPI_Write_Byte(0);
    SPI_Write_Byte(0);
    VS_delay(60000);  /* Here is a time delay , You can hear “ Sine tone ”*/
    VS_delay(60000);
    VS_delay(60000);
    VS_delay(60000);
    VS_delay(60000);
    VS_delay(60000);
    SPI_Write_Byte(0x45);  /* Write the following 8 Bytes , Exit sine test */
    SPI_Write_Byte(0x78);
    SPI_Write_Byte(0x69);
    SPI_Write_Byte(0x74);
    SPI_Write_Byte(0);
    SPI_Write_Byte(0);
    SPI_Write_Byte(0);
    SPI_Write_Byte(0);                                                                                              
    Mp3DeselectData();        // Close data slice selection
    
}

 

 

 unsigned char VS10XX_SendMusicData( unsigned char *dat)
{
    unsigned char i;
    while(!(P2IN&MP3_DREQ));
           set_SPI_bps(15);   
        Mp3SelectData();       // Open data slice selection , That is to open SDI transmission
        for(i=0; i<8; i++)
        {
            SPI_Write_Byte(dat[i]);
        }
         Mp3DeselectData();        // Close data slice selection
        return 0;

}

end 

https://wenku.baidu.com/view/fa1efcc990c69ec3d4bb756a.html

This article is well written , The debugging idea is relatively clear